Conspiracies are legal! You may have one conspiracy that can count as your rare, it does not count toward your 40 card deck.
Permalink
The conspiracies will be singleton like with the rest of the deck. It doesn't count to the 40 card limit. I'm thinking one conspiracy per deck.
http://www.mtgvault.com/simicmartin35/decks/korimarx-king-of-traitors/
21-40 of 112 items